I have Two Brothers Juicebox in both of mine. The difference is not only noticeable but ABSOLUTELY INCREDIBLE. You will def go through more petrol (although you can tweak it down with a couple pushes of the buttons in a matter of seconds). The stock settings that came on mine are perfect so i never mess with them. Things i noticed, much better throttle response, much better acceleration and all around beefier feel and sound. I have had mine for 2 years and never had a single problem with either one. I had a question a couple of weeks ago about best settings for my riding, called up Two Brothers and they instantly put a developer for the Juicebox on the phone to speak with me (awesome). hope this helps, I've completely enjoyed mine, never had a problem and have had excellent service. Oh and all this takes maybe 3 1/2 minutes to install/uninstall if it goes in to the "judgmental doctors office"